According to destroyer endocytosis requires ATP. I was not aware of this, and apparently neither is Wiki. So can someone explain and please elaborate on the differences between pinocytosis, phagocytosis and receptor-mediate. which ones require ATP and which do not.

pinocytosis = "cell drinking"
phagocytosis = "cell eating"
i think these are just types of endocytosis. endocytosis is the invagination of a plasma membrane to form vesicles. it is an examples of active transport which requires atp. im not exactly sure what receptor mediate is...i thought it was just another type of endocytosis. if it is, it requires atp since endocytosis does.

pinocytosis is cell drinking but it's not really drinking it just means that it's taking smaller matter in via endocytosis compared to phagocytosis.

receptor mediated endocytosis is also a type of phagocytosis. This is a specific type of endocytosis since you are binding a specific molecule to the receptor to bring something in. LDL is a good example since it is a lipoprotein that transports cholesterol and fat by this way.

When the body needs some cholesterol it makes LDL receptors on the plasma membrane and then LDL binds it to the receptor to do some cholesterol transport.